Making a bolt with double threads - DOES IT WORK? - Lost PLA metal casting - 3d print to solid metal

Using the lost PLA metal casting I will turn 3d prints into metal castings in my DIY backyard foundry. I started by printing the models on my 3d printer. I then coated them with a ceramic material. I then fired the shell in my kiln and then poured metal into the shell. This is similar to the lost wax casting process. -------- Affiliate links to items used in this video ------- Pyramid A1.1 3d printer The best polishing wheels ever Overture 3d printer filament